*{
    padding: 0;
    margin: 0;
    list-style: none;
}
html,body,#root,.App{
    width: 100%;
    height: 100%;
}
header{
    width: 100%;
    height: 100px;
    background: seagreen;
    color: #fff;
    font-size: 30px;
}
header span{
    display: inline-block;
    margin-left: 30px;
    margin-top: 30px;
}
main{
    width: 100%;
    height: calc(100% - 200px);
}
footer{
    width: 100%;
    height: 100px;
    border: 1px solid #ccc;
}
main p{
    margin-left: 10px;
}
main p input{
    width: 92%;
    height: 30px;
    margin-top: 10px;
}
main p button{
    width: 50px;
    height: 35px;
    color: #fff;
    background: seagreen;
}
ul li{
    width: 80%;
    height: 80px;
    background: seagreen;
    margin-left: 100px;
    margin-top: 10px;
}
ul li input{
    margin-top: 30px;
    margin-left: 20px;
}
ul li span{
    float: right;
    margin-right: 10px;
    margin-top: 30px;
}
ul li button{
    margin-left: 30px;
}
ul li b{
    margin-left: 30px;
}